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OR 18 Spur: South Yamhill River Bridge Replacement

Construction Phase

Region 2: Willamette Valley and Northwest Oregon (McMinnville, Yamhill County)

​​​​​​​​​​​​​​​​​​​​​​​​​​​​This project will replace the South Yamhill River Bridge located on the OR 18 spur section at milepost 46.66. ​

Banner: Slow down, in the work zone it could save lives. Building a modern transportation system to help Oregon’s communities and economy thrive. During construction, Give yourself more time, try a new way or mode to get there or take a different route.


Traffic Impact

Expect lane closures and delays up to 20 minutes. 

Construction Impacts

Three Mile Lane has a single lane closure Monday through Thursday from 6 a.m to 4:30 p.m., use caution. You can expect:

  • Flaggers helping direct traffic while crews are working.
  • Construction noise and delays.

Sign up for project email alerts​ to stay up-to-date on the road closure, future opening and more.

Construction Activities

We're mostly done with road work and building the new bridge. Crews are:
  • Removing the temporary and work bridges. 
  • Cleaning and adding landscaping to the area. ​

Visit TripCheck​ for the most current traffic information.​

​Pedestrians, including those with disabilities, will have access through or around work zones. ​

work zone construction iconPay attention in the work zone, slow down and move over – imagine this is where you work! 

Always drive safely, watch for construction signs and workers. 

Remember: fines double in all Oregon work zones, whether workers and signs are present or not. ​​​



​​Enlarged project mapThe South Yamhill River Bridge was built in 1951 and is approaching the end of its functional lifespan with many components that are in poor condition. 

This project will replace the South Yamhill River Bridge on a busy route into and out of McMinnville with a daily average daily traffic volume of 16,000 vehicles. ​​The new bridge will replace the existing 35 foot wide bridge with a wider 48 foot wide bridge. This will better accommodate large trucks, bicycles and pedestrians. 

project alerts iconFor construction staging, a detour bridge will be placed to the west of the existing bridge. Traffic will be detoured while the existing bridge is removed and the new one is constructed in the same location.


Design through 2021.
Construction to begin in 2021 and estimated to last four years.


  • We will build a temporary diversion bridge to the west of the existing bridge. 


  • We will build the connections from the road to the temporary diversion bridge. Our crews will mostly be working off of the existing roadway. 
  • After we build the connections, we will route traffic and pedestrians to the diversion bridge, remove the existing bridge and construct the new bridge. 

2023 - 2024

  • We will complete the construction of the new bridge and rebuild connections to the roadway.
  • We will construct a sanitary sewer line along Three Mile Lane.
    • During this time expect delays and road closures to a single lane of traffic controlled by flaggers. 


OR 18 | ​South Yamhill River Bridge in McMinnville

Cost and Funding

​The project will cost an estimated $38 million.

Contacts & Media

Project map

Project Contacts

Resident Engineer
Scott Nelson

Public Information Officer
David House
Public Comment Form
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Last Updated

7/9/2024 12:29 PM

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